An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Elevated freight railway turned wildly successful urban park.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Famously misunderstood wonder of the ancient world

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The final resting place of New Orleans' most famous voodoo priestess.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Northern Ireland's Brobdingnagian stepping stones.

The first declared National Monument in the United States.

A snapshot of the city's fascinating voodoo culture.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

A walk through the historic city center, under the streets of Seattle.

Monasteries on rock pillars, once accessible only by frayed ropes.

Enormous lake at the bottom of a unique cave system.

A battle between nature and architecture in the Cambodian jungle.

Odd outsider art installations surround a Gold Rush-era ghost town.

Medicinal spa created with the discharge from a geothermal energy plant.

Macabre astrological automaton clock dating to the late 1400s.

World's first "penitentiary," meant to be humane, drove men insane.

A church of bones, decorated with 40,000 human skeletons.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A crumbling hospital from the 1850s on Roosevelt Island.